Heat laminatable polyether urethane foam

ABSTRACT

Polyether urethane foams that are heat laminatable are prepared by incorporating within the foam an effective amount of an organophosphorus additive. This organophosphorus additive can be an organophosphite, an organophosphonate, an organophosphate, and a mixture thereof. This foam can also include an halogenated flame retardant.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to laminates of a substrate and polyetherurethane foam, and particularly to such laminates that are produced byheat sealing. More particularly, the invention relates to urethane foamlaminates wherein the urethane foam is treated with aphosphorus-containing additive.

2. Related Information

In the preparation of many articles which employ flexible polyurethanefoams, it is necessary to form an adhesive bond between the foam and asubstrate such as wood, a fabric, a metal and organic plastic, etc. Heatsealing is a useful process for adhering a polyurethane foam to asubstrate. In this process, the surface of a foam is heated to form alayer of tacky liquid, after which the substrate is applied to the fusedsurface of the foam to form a laminate. When the layer of tacky liquidcools and resolidifies, the resulting bond between the polyurethane foamand the substrate is frequently as strong or stronger than the strengthof the original polyurethane foam. Heretofore, only polyester-typeurethane foams were laminatable in this manner. The less expensivepolyether-type urethane forms could not be heat sealed because the fusedsurface layer would not resolidify.

U.S. Pat. No. 3,205,120 [Flanders, Sept. 7, 1965] discloses heat sealedurethane foam laminates that are prepared from the less expensivepolyether urethane foam. This patent discloses that in an otherwiseconventional commercial polyether flexible urethane foam reactionmixture, a minor amount of a low molecular weight polyol selected fromthe group consisting of a polyoxyalkylene polyol, a hydroxyaliphaticester of a phosphorus-containing acid and a hydroxyl-containing naturaloil was included.

U.S. Pat. No. 3,497,416 [Critchfield et al., Feb. 24, 1970] disclosesheat sealed urethane foam laminates prepared from polyether-basedurethane foam. The urethane foam comprises the reaction product of apolyether polyol and polyisocyanate prepared by reacting dipropyleneglycol or dibutylene glycol with an excess of an aromaticpolyisocyanate. This patent identifies certain processing difficultiesencountered in the production of polyether urethane foams as disclosedin Flanders that are caused by the high reactivity of the polyetherpolyol mixture used.

U.S. Pat. No. 3,131,105 [Codos, Apr. 28, 1964] discloses a method forforming a laminated structure by applying onto the surface of apolyurethane foam, a coating of an inflammable substance which whenignited will plasticize said surface, igniting said coating toplasticize the surface and then applying with pressure a layer ofmaterial with which the plasticized surface will form a bond onto theplasticized surface while the surface is soft and tacky. This method isuseful for both polyesters and polyether urethane foams, however, itdoes not disclose the use of any additives within these foams.

U.S. Pat. No. 3,142,650 [Friedman, July 28, 1964] discloses thepreparation of polyurethanes from phosphite esters containing availablesecondary hydroxyl groups, for example a tris-polypropylene glycolphosphite. This patent does not disclose heat sealable polyetherurethane foam laminates.

U.S. Pat. No. 3,142,651 [Friedman, July 28, 1964] discloses thepreparation of polyurethanes from phosphite esters containing availablehydroxyl groups, preferably secondary hydroxyl groups. The patent alsodiscloses the preparation of polyurethanes from the correspondingthiophosphate esters, phosphate esters and certain phosphonates. Thispatent does not disclose heat sealable polyether urethane foamlaminates.

U.S. Pat. No. 4,135,042 [Lickei et al., Jan. 16, 1979] discloses the useof phosphites as scorch inhibitors in polyurethane foams containinghalogenated phosphate polyester additives. Again this patent does notdisclose heat sealable polyether urethane foam laminates.

SUMMARY OF THE INVENTION

This invention is a heat laminatable polyether urethane foam compositionwhich comprises at least one organophosphorus additive said additivebeing effective to impart heat laminatable properties to the resultingfoam. The organophosphorus additive can be an organophosphite, anorganophosphonate, and an organophosphate. The organophosphite can beselected from the group consisting of diphosphites, pentaerythritoldiphosphites, alkyl phosphites and aryl phosphites. The composition canfurther comprise an halogenated flame retardant. This urethane foamcomposition can be used to prepare a laminated structure which comprisesat least one layer of the resulting flexible polyether urethane foamheat sealed to a substrate.

An object of this invention is to provide laminated structures having atleast one layer comprising a flexible polyether urethane foam that isheat sealable to a substrate without encountering the processingdifficulties encountered in the production of the Flanders polyetherurethane foam that are caused by the high reactivity of the polyetherpolyol mixture and without being limited to the reaction scheme ofCritchfield which involves using aromatic isocyanates pre-reacted withdiols.

A further object of this invention is to provide flame laminatablepolyether urethane foams using hydroxyl and non-hydroxyl-containingorganophosphorus compounds such as organophosphites, organo-phosphonatesand organophosphates while using the conventional one shot techniquewithout encountering processing difficulties.

Other objects and advantages of the present invention are describedelsewhere within this specification.

DETAILED DESCRIPTION OF THE INVENTION

It has been found that urethane foam laminates having outstandingproperties can be produced by heat sealing a substrate onto a particularurethane foam, fully described below. The laminates produced inaccordance with this invention are produced from polyether-basedurethane foam rather than from the more expensive polyester-basedurethane foam.

The urethane foams that are employed in this invention can be preparedby conventional polyurethane flexible, foam-forming technology.Polyurethane foams, according to this invention, having a density offrom about 16 to about 48 kilograms per cubic meter are prepared byknown methods, such as the prepolymer, quasi-polymer, or one shotsystems. Foams can be prepared by batch or continuous processes. Thefoam-forming mixtures should include as basic ingredients: (A) polyetherpolyol, (B) organic isocyanate, (C) blowing agent, (D) polyurethanecatalyst, (E) surfactant, and (F) at least one organophosphorus additiveeffective to impart heat laminatable properties.

The polyether polyol ingredient (A) for the polyurethane foamcomposition of this invention can be selected from any of the widevariety of polyhydric polyether compounds available and conventionallyused by the art for the preparation of flexible ether-type polyurethanefoams. The most common polyether polyol compounds, the polyoxyalkylenepolyether polyols, are generally prepared by the reaction of an alkyleneoxide, such as 1,2-propylene oxide, with a polyhydric initiator orstarter. The polyhydric initiator or starter can be, e.g., glycerol,trimethylolethane, trimethylolpropane, triethanolamine or a polyethyleneglycol.

The alkylene oxides used in preparing the polyethers preferably arethose which contain from 2 to 4 carbon atoms, e.g., ethylene oxide,1,2-propylene oxide, 1,2-butylene oxide, trimethylene oxide andtetramethylene oxide. Also useful are the poly-(aralkylene ether)polyolswhich are derived from the corresponding aralkylene oxides such as,e.g., styrene oxide, alone or mixed with an alkylene oxide. Generally,propylene oxide, that is, the 1,2-propylene oxide, and mixtures of1,2-propylene oxide with ethylene oxide are preferred for thepreparation of the polyether polyol reactant. Also useful as polyols inthe practice of this invention are the so-called graft polymers, thatis, polyether polyols which have been modified with acrylonitrile and/orstyrene in such a way that some is grafted onto the backbone of thepolyether polyol (but not on the functional, hydroxyl group) and some ispresent as a polymer dispersed in the polyol.

The polyethers used in the present invention preferably have molecularweights of from about 2,000 to about 6,000 and optimally from about3,000 to about 4,500 and an average hydroxy functionality of from about2 to about 3. There are several commercially available examples of thesepolyethers. One example is Niax® 16-56 brand polyether polyol, a productof Union Carbide Corporation.

The organic polyisocyanate ingredient (B) of the foam-forming processcan be selected from conventional isocyanates used for such purposes.Preferably the isocyanate has an isocyanate functionality of from 2 to3. Useful isocyanates include aromatic, aliphatic, cycloaliphatic,heterocyclic types and mixtures thereof. Suitable organic isocyanatesinclude toluene diisocyanate and phenylene diisocyanates, with toluenediisocyanate being preferred because of cost and availability.

The blowing agent (C) ingredient can comprise water alone or water incombination with other conventional blowing agents, such as methylenechloride, or hydrocarbons or fluorocarbons having a boiling point fromabout -30° C. to 60° C.

The polyurethane catalyst ingredient (D) can be selected fromconventional materials. Suitable catalysts include amines such astertiary amines and metal compounds such as stannous octoate, dibutylindilaurate, etc.

The surfactant ingredient (E) employed in the process of this inventioncan be selected from surfactants conventionally used for such purposes.Although a variety of surfactants are operative in this invention, ithas been found that particularly desirable uniform cell structure andappearance can be given to the foam if a silicone surfactant is used,e.g., Union Carbide Corporation ™L5810 and L5740 nonhydrolyzablesilicone surfactants.

The polyether urethane foam composition of this invention is renderedheat laminatable by the inclusion of at least one organophosphorusadditive (F), said additive being effective to impart heat laminatableproperties. This organophosphorus additive is derived from phosphoruscontaining acids, for example, organophosphites derived from phosphorousacid, organophosphonates derived from phosphonic acid, andorganophosphates derived from phosphoric acid.

Suitable organophosphites can include diphosphites, pentaerythritoldiphosphites, alkyl phosphites, aryl phosphites, and other phosphites.

Suitable diphosphites are of the general formula: ##STR1## Where R isselected independently each time it occurs from the group consisting ofalkyl having 1 to 20 carbon atoms inclusive and preferably 1 to 10carbon atoms inclusive; and haloalkyl having 1 to 20 carbon atomsinclusive and preferably 1 to 10 carbon atoms inclusive. Where R is anhaloalkyl, the chloroalkyl is preferred.

Suitable pentaerythritol diphosphites are of the general formula:##STR2## where R¹ is selected independently each time it occurs from thegroup consisting of alkyl having 1 to 18 carbon atoms inclusive andpreferably having 1 to 10 carbon atoms inclusive; and phenyl andsubstituted phenyl wherein the substituents are selected from the groupconsisting of alkyl having 1 to 4 carbon atoms. Some preferred examplesinclude diisodecyl pentaerythritol disphosphite where R¹ is alkyl having10 carbon atoms; distearyl pentaerythritol disphosphite where R¹ isalkyl having 18 carbon atoms; andbis(2,4-di-t-butylphenyl)pentaerythritol diphosphite.

Suitable alkyl phosphites are of the general formula (R² O)₃ P where R²is selected independently each time it occurs from alkyl having 1 to 20carbon atoms inclusive and preferably 3 to 18 carbon atoms inclusive.Some preferred examples include triisodecyl phosphite, triisoctylphosphite, trilauryl phosphite and tristearyl phosphite.

Suitable aryl phosphites are of the general formula (R³ O)₃ P where R³is selected independently each time it occurs from the group consistingof aryl and substituted aryl wherein the substituents are alkyl having 1to 10 carbon atoms inclusive; and alkyl having 1 to 10 carbon atomsinclusive. Some preferred examples include triphenyl phosphite, alkylderivatives of triphenyl phosphite, diphenyl isodecyl phosphite, phenyldiisodecyl phosphite, diphenyl isooctyl phosphite and octyl diphenylphosphite.

Another suitable phosphite can include tri(betachloroethyl)phosphite(FYROL®TBCEP brand of Stauffer Chemical Company).

Suitable organophosphonates can include di(polyoxyethylene)hydroxymethylphosphonate (VICTASTAB®HMP brand flame retardant intermediate ofStauffer Chemical Company),diisopropyl-N,N-bis(2-hydroxyethyl)aminomethyl phosphonate (FYROL® 7brand flame retardant of Stauffer Chemical Company),diethyl-N,N-bis(2-hydroxyethyl)aminomethyl phosphonate (FYROL® 6 brandflame retardant of Stauffer Chemical Company),diisopropyl-N,morpholine-aminomethyl phosphonate (FYROL® 7M brand flameretardant of Stauffer Chemical Company) andbis(beta-chloroethyl)beta-chloroethyl phosphonate (FYROL®BBCEP brandflame retardant of Stauffer Chemical Company). The first threephosphonates listed immediately above all contain hydroxyl groups,however these phosphonates, like the others, are useful in impartingheat laminatable properties to the polyether urethane foam compositionsof this invention and are not used herein as the reactive ingredientpolyol source as used in the Flanders patent discussed above.

Suitable organophosphates are of the general formula (R⁴ O)₃ P═O whereR⁴ is selected independently each time it occurs from the groupconsisting of alkyl having 1 to 10 carbon atoms inclusive and preferably1 to 4 carbon atoms inclusive; and alkoxy alkyl with the alkoxy having 1to 4 carbon atoms and the alkyl having 1 to 4 carbon atoms. Somepreferred examples include tributyl phosphate and tributoxy ethylphosphate.

The organophosphorus additive of this invention must include at leastone of the above described additives and mixtures of these additives canbe used.

The flame laminatable polyether urethane foam composition of thisprocess can further comprise a halogenated flame retardant. The use ofsuch a flame retardant appears to serve as a processing aid with certainobservable improvements in the process of making flame laminatablefoams, e.g., control of the rate of adhesive formed during flamelamination. The addition of the halogenated flame retardant by itself,without the inclusion of at least one of the other additives describedabove, will not render the foam heat laminatable but appears to act as aprocessing aid and/or controller when used with the above describedadditives. The halogenated flame retardant ingredient used in thecompositions and processes of this invention can be selected fromconventional polyurethane flame retardant agents. The term "halogenatedflame retardant" as used in the context of this invention includeshalogenated hydrocarbons and halogenated organophosphorus compounds.

Suitable halogenated flame retardants are, e.g.,tris(1,3-dichloropropyl)phosphate, tris(2,3-dibromopropyl)phosphate,dichloromethylene-bis(di-2-chloroethyl)phosphate,tris(2-chloroethyl)phosphate, tris(2-chloropropyl)phosphate,2,2-bis-(chloromethyl)-1,3-propylene, bis-di(2-chloroethyl)phosphate,bis(dichloropropyl)tribromoneopentylphosphate,tetrakis(2-chloroethyl)ethylene diphosphate, pentabromodiphenyl oxide,bis(pentabromophenoxy)ethane, bis(tetrabromophthalimide)ethane,tetrabromobisphenol A, hexabromocyclododecane,bis(tribromophenoxy)ethane, octabromodiphenyl oxide, tribromoneopentylalcohol, chlorinated paraffin, brominated paraffin, and mixturesthereof.

The amount of additive used in the compositions and processes of thisinvention is an amount sufficient to give the flame laminatable propertyto the resulting polyether urethane foam. However, amounts ranging from1 part to 10 parts by weight per 100 parts by weight of the polyetherpolyol can be used, with from 3 parts to 8 parts by weight per 100 partsby weight of the polyether polyol being preferred.

Similarly, the amount of halogenated flame retardant used is an amounteffective to enhance the flame laminatable characteristics of theresulting polyether urethane foam. The foam composition can optionallyinclude this halogenated flame retardant. From 5 parts to 20 parts byweight per 100 parts by weight of the polyether polyol can be used, withfrom 5 parts to 15 parts by weight per 100 parts by weight of thepolyether polyol being preferred.

The additive used in this invention can be a premixed, storage stablecomposition of matter suitable for addition to a foam-forming reactionsystem to impart the desired flame laminatable characteristic. When thehalogenated flame retardant is included in this mixture, the additionalquality of flame retardance is imparted to the resulting product. Avariety of optional ingredients can be added to the additivecombination. For example, the combination can include the polyetherpolyol, solvents, diluents, colorants, stabilizers, cell openers,lubricants, biocides, etc. Normally, the isocyanate reactant cannot beincluded in the mixture. The additive can be used by mixing it in anyorder with the polyurethane foam-forming ingredients either prior to orat the time of reaction.

A laminated structure has also been discovered which comprises at leastone layer of a flexible polyether urethane foam heat sealed to asubstrate. This flexible polyether urethane foam is of the compositiondisclosed above.

The substrates which can be employed include spun, woven, knitted,felted, matted and the like textile fabrics produced from natural andsynthetic fibers such as cotton, wool, silk, linen, jute, hemp, sisal,nylon, polyester, polyacrylonitrile, vinylchloride-acrylonitrilecopolymer, rayon, polyurethane spandex and the like. Other usefulsubstrates include plastic film prepared from polyvinylchloride,vinylchloride-vinyl acetate copolymers, vinylidene chloride homopolymersand copolymers, cellophane, polyethylene, polypropylene, polystyrene andthe like. Preferred substrates include fabrics, particularly cottonfabrics, and films produced from vinylchloride polymers (bothhomopolymers and copolymers).

This invention further contemplates a process for rendering thepolyether urethane foam flame laminatable by incorporating therein aneffective amount of the additive discussed above. The halogenated flameretardant can also be optionally added. The invention also contemplatesthe process for producing the laminated structure which comprises heatsealing the substrate to the polyether urethane foam, said foam beingproduced as described above.

The laminates of this invention can be produced by heating part or allof the surface of the urethane foam described above to a temperatureabove the fusion temperature of the foam to form a tacky liquid orsemiliquid layer, and thereafter or at the same time with the heatingoperation, applying the substrate to the tacky surface of the foam andholding in contact therewith while cooling until the surface cools andresolidifies, thereby forming an adhesive bond between the foam and thesubstrate. The fusion temperature of the foam can vary depending uponthe nature and amount of the components therein, but in general canrange from about 205° C. to about 316° C. It is generally desirable notto heat the surface of the foam to a temperature higher than about 38°C. above the fusion temperature of the particular foam. In keeping thesubstrate in contact with the fused surface of the foam until thesurface has cooled and resolidified, it is desirable to employ amoderate amount of pressure to maintain the foam and substrate incontact. This pressure can be as low as that resulting from the weightof the foam or the substrate, but is preferably of the order of fromabout 0.1 to about 100 or more pounds per square inch (metricequivalent).

The heat can be applied to the surface of the foam by any convenientmeans, for example, a flame, a hot surface such as a "hot plate",infrared heating, and the like. However, this invention is particularlyuseful in flame lamination.

The laminated structures of this invention are widely usefulcompositions. For example, the fabric urethane foam laminates are usefulin the production of padded clothing, insulation, cushions and the like.The laminates are generally widely useful in the production ofcushioning, heat and sound insulation, crash pads and the like.

The following examples describe various embodiments of the invention.Other embodiments will be apparent to one of ordinary skill in the artfrom a consideration of this specification or practice of the inventiondisclosed herein. It is intended that the specification and examples beconsidered as exemplary only, with the true scope and spirit of theinvention being indicated by the claims which follow the examples.

EXAMPLES 1-10

These examples describe the batch preparation of flexible polyurethanefoams by the "one shot" method. The ingredients used and the testresults are summarized in Table I.

                                      TABLE I                                     __________________________________________________________________________                   Examples - Parts by Weight                                                    1   2   3   4   5   6   7   8   9   10                         __________________________________________________________________________    Basic Ingredients                                                             Niax 16-56 polyether polyol                                                                  100 100 100 100 100 100 100 100 100 100                        sold by Union Carbide Corp.                                                   80/20 Toluene diisocyanate                                                                   51.0                                                                              51.0                                                                              51.0                                                                              51.0                                                                              51.0                                                                              51.0                                                                              51.0                                                                              51.0                                                                              51.0                                                                              51.0                       L-5740 Silicone sold by                                                                      1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4                        Union Carbide Corp.                                                           N--ethylmorpholine                                                                           1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3                        Stannous octoate                                                                             0.21                                                                              0.21                                                                              0.21                                                                              0.21                                                                              0.21                                                                              0.21                                                                              0.21                                                                              0.21                                                                              0.21                                                                              0.21                       Methylene Chloride                                                                           1.50                                                                              1.50                                                                              1.50                                                                              1.50                                                                              1.50                                                                              1.50                                                                              1.50                                                                              1.50                                                                              1.50                                                                              1.50                       Water          3.85                                                                              3.85                                                                              3.85                                                                              3.85                                                                              3.85                                                                              3.85                                                                              3.85                                                                              3.85                                                                              3.85                                                                              3.85                       Additives                                                                     Fyrol ® FR-2 flame retardant,                                                            --  15  15  --  --  --  --  --  --  --                         product of Stauffer Chemical                                                  Co., tri(1,3-dichloropropyl)-                                                 phosphate                                                                     Diiosdecyl pentaerythritol                                                                   --  --  5   --  --  --  --  --  --  --                         diphosphite                                                                   Tris(dipropyleneglycol)                                                                      --  --  --  5   --  --  --  --  --  --                         phosphite                                                                     Tris(mono-dinonylphenyl)                                                                     --  --  --  --  5   --  --  --  --  --                         phosphite                                                                     Tri(beta-chloroethyl)phosphite                                                               --  --  --  --  --  5   --  --  --  --                         Di(polyoxyethylene) hydroxy-                                                                 --  --  --  --  --  --  5   --  --  --                         methyl phosphonate                                                            (Victastab ® HMP brand of                                                 Stauffer Chemical Co.)                                                        Diethyl N,N--bis(2-hydroxy-                                                                  --  --  --  --  --  --  --  5   --  --                         ethyl) aminomethyl phos-                                                      phonate (Fyrol ® 6 flame                                                  retardant, product of Stauffer                                                Chemical Co.)                                                                 Tributoxy ethyl phosphate                                                                    --  --  --  --  --  --  --  --  5   --                         Tributyl phosphate                                                                           --  --  --  --  --  --  --  --  --  5                          Results        N.sup.a                                                                           P.sup.a                                                                           E.sup.a                                                                           E.sup.a                                                                           E.sup.a                                                                           E.sup.a                                                                           E.sup.a                                                                           E.sup.a                                                                           F.sup.a                                                                           F.sup.a                    Flame laminate bond strength                                                  __________________________________________________________________________     .sup.a N designates none; P designates poor; F designates fair; and E         designates excellent flame laminate bond strength.                       

The foams of Examples 1-10 were each prepared by the same method usingthe same basic ingredients. The toluene diisocyanate ingredient wasadded to the mixture of the other ingredients in the formulation. Atypical density of the polyether urethane formulation was 1.5 pcf(metric equivalent?)

The resulting foams were sliced into 1/4" (0.635 cm) thick 4"×4" (10.16cm×10.16 cm) specimens. A bunsen burner, equipped with a wing top andusing propane gas, was used as the flaming source. A blue flame wasused. The flame was applied to the surface of each foam for a timesufficient to melt the top surface of the foam to provide a liquid. Theback of the fabric was then pressed against the melted foam surface withsufficient pressure to ensure good contact. A laminate resulted. Thislaminate was allowed to cool to room temperature.

The bond strength of the cooled laminate was tested by a tugging attemptto separate the fabric from the foam. The flame laminate bond strengthwas rated as excellent when the bond strength approached the tensilestrength of the original foam.

The foam of Example 1 was the control which did not contain anyadditives. The foam of Example 2 contained only the halogenated flameretardant. The foam of Example 1 exhibited no bond strength whereas thefoam of Example 2 exhibited some bond strength but this was rated aspoor. The foam of Example 3 contained both the halogenated flameretardant and diisodecyl pentaerythritol diphosphite and exhibitedexcellent bond strength.

The foams of Examples 4 to 10 each contained one additive selected fromeither an organophosphite, and organophosphonate or an organophosphate.These foams all exhibited fair to excellent bond strengths. Generally,the organophosphites were judged to exhibit better bond strength thanthe organophosphonates, which in turn exhibited better bond strengththan the organophosphates.

What is claimed is:
 1. A heat laminatable polyether flexible urethanefoam composition which comprises at least one organophosphorus additive,said additive being present in an amount effective to impart heatlaminatable properties to the resulting foam and wherein theorganophosphorus additive is an organophosphite.
 2. The composition ofclaim 1 wherein the organophosphite is selected from the groupconsisting of diphosphites, pentaerythritol diphosphites, alkylphosphites and aryl phosphites.
 3. A heat laminatable polyether flexibleurethane foam composition which comprises at least one organophosphorusadditive, said additive being present in an amount effective to impartheat laminatable properties to the resulting foam and wherein theorganophosphorus additive is a hydroxyalkylaminoalkylphosphonate.
 4. Thecomposition of claim 3 wherein the organophosphorus additive is ahydroxyalkylaminoalkylphosphonate selected from the group consisting ofdiisopropyl-N,N-bis(2-hydroxyethyl)aminomethyl phosphonate anddiethyl-N,N-bis(2-hydroxyethyl)aminomethyl phosphonate.
 5. Thecomposition of claim 1 which further comprises an halogenated flameretardant.
 6. The composition of claim 2 which further comprises anhalogenated flame retardant.
 7. The composition of claim 3 which furthercomprises an halogenated flame retardant.
 8. The composition of claim 4which further comprises an halogenated flame retardant.
 9. Thecomposition of claim 5 wherein the halogenated flame retardant isselected from the group consisting of tris(1,3-dichloropropyl)phosphate,tris(2,3-dibromopropyl)phosphate,dichloromethylene-bis(di-2-chloroethyl)phosphate,tris(2-chloroethyl)phosphate, tris(2-chloropropyl)phosphate,2,2-bis-(chloromethyl)-1,3-propylene, bis-di(2-chloroethyl)phosphate,bis((dichloropropyl)tribromoneopentyl)phosphate,tetrakis(2-chloroethyl)ethylene diphosphate, pentabromodiphenyl oxide,bis(penta-bromophenoxy)ethane, bis(tetrabromophthalimide)ethane,tetrabromobisphenol A, hexabromocyclododecane,bis(tribromophenoxy)ethane, octabromodiphenyl oxide, tribromoneopentylalcohol, chlorinated paraffin, brominated paraffin, and mixturesthereof.
 10. A process for rendering polyether flexible urethane foamflame laminatable which comprises incorporating therein an effectiveamount of an organophosphorus additive, said additive being anorganophosphite.
 11. The process of claim 10 wherein the organophosphiteis selected from the group consisting of diphosphites, pentaerythritoldiphosphites, alkyl phosphites and aryl phosphites.
 12. A process forrendering polyether flexible urethane foam flame laminatable whichcomprises incorporating therein an effective amount of anoganophosphorus additive, said additive being ahydroxyalkylaminoalkylphosphonate.
 13. The process of claim 12 whereinthe organophosphorus additive is a hydroxyalkylaminoalkylphosphonateselected from the group consisting ofdiisopropyl-N,N-bis(2-hydroxyethyl)aminomethyl phosphonate,diethyl-N,N-bis(2-hydroxyethyl)aminomethyl phosphonate and mixturesthereof.
 14. The process of claim 10 which further comprisesincorporating therein an effective amount of an halogenated flameretardant.
 15. The process of claim 11 which further comprisesincorporating therein an effective amount of an halogenated flameretardant.
 16. The process of claim 12 which further comprisesincorporating therein an effective amount of an halogenated flameretardant.
 17. The process of claim 13 which further comprisesincorporating therein an effective amount of an halogenated flameretardant.
 18. The process of claim 14 wherein the halogenated flameretardant is selected from the group consisting oftris(1,3-dichloropropyl)phosphate, tris(2,3-dibromopropyl)phosphate,dichloromethylene-bis(di-2-chloroethyl)phosphate,tris(2-chloroethyl)phosphate, tris(2-chloropropyl)phosphate,2,2-bis-(chloromethyl)-1,3-propylene, bis-di(2-chloroethyl)phosphate,bis((dichloropropyl)tribromoneopentyl)phosphate,tetrakis(2-chloroethyl)ethylene diphosphate, pentabromodiphenyl oxide,bis(penta-bromophenoxy)ethane, bis(tetrabromophthalimide)ethane,tetrabromobisphenol A, hexabromocyclododecane,bis(tribromophenoxy)ethane, octabromodiphenyl oxide, tribromoneopentylalcohol, chlorinated paraffin, brominated paraffin, and mixturesthereof.